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US3274364A Expired / Lapsed US ⏱️ 0.0 years remaining

By-pass switch for operation without interrupting service

Assignee: Kearney National Inc
•
Filing: 1962-04-30
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Granted: 1966-09-20
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Expires: 1982-04-30
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Abstract

No abstract record available.

Inventors

  • 👤 Robert S Sullivan
  • 👤 Thomas B Ortwig

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 14:37
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/002; H01H31/00; H01H31/26; H01H31/28; H01H33/02; H01H33/04; H01H33/16

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US385826A Cited
US535077A Cited
CA561556A Cited
US820331A Cited
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US2099639A Cited
US2180193A Cited
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US2838636A Cited
US3039041A Cited
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FR819416A Cited
US3071662A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-09-19 1970-03-21 1970-09-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-09-19 1974-03-21 1974-09-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-09-19 1978-03-21 1978-09-20 $7700.00 Window Closed / Lapsed

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